Transmission apparatus and reception apparatus

Abstract

A transmission apparatus used in a mobile communication system adopting a single carrier scheme in an uplink includes: multiplexing means configured to multiplex a pilot channel, a control channel, and a data channel; and transmission means configured to transmit a transmission symbol including at least the pilot channel and the control channel using the uplink. A first pilot channel used for a reception apparatus to measure channel state of the uplink is transmitted using a frequency band over a plurality of resource blocks. A second pilot channel for compensating for a channel transmitted by the uplink is transmitted by a resource block assigned to the transmission apparatus. Control channels of the transmission apparatus and the apparatus other than the transmission apparatus are orthogonalized with each other by a FDM scheme.

The invention claimed is: 
     
       1. A user apparatus for use in a mobile communication system in which a single carrier scheme is adopted in uplink and a system band is divided by a plurality of resource blocks, the user apparatus comprising:
 a mapping unit configured to map, to predetermined resource blocks, a data channel of the user apparatus, a first pilot channel that is not related to the data channel of the user apparatus, a second pilot channel that is related to the data channel of the user apparatus, and a control channel of the user apparatus; and 
 a transmission unit configured to transmit the data channel of the user apparatus, the first pilot channel, the second pilot channel and the control channel of the user apparatus that are mapped by the mapping unit, 
 wherein the mapping unit maps the first pilot channel to a plurality of resource blocks, and maps the second pilot channel to a resource block that is a same resource block as a resource block to which the data channel of the user apparatus is mapped, and 
 wherein the mapping unit maps the control channel of the user apparatus to the resource block to which the data channel of the user apparatus is mapped when the control channel of the user apparatus and the data channel of the user apparatus are mapped to a same subframe, and the mapping unit maps the control channel of the user apparatus to distributed resource blocks when the control channel of the user apparatus and the data channel of the user apparatus are not mapped to the same subframe. 
 
     
     
       2. The user apparatus as claimed in  claim 1 , wherein the mapping unit maps the control channel to the resource block to which the data channel is mapped in the subframe where the data channel is mapped, and maps the control channel to a resource block other than resource blocks assigned to data channels of other user apparatuses in a subframe where the data channel is not mapped. 
     
     
       3. The user apparatus as claimed in  claim 1 , wherein the first pilot channel mapped by the mapping unit is used for measurement, and the second pilot channel is used for demodulation of the data channel. 
     
     
       4. The user apparatus as claimed in  claim 1 , wherein the mapping unit time-division multiplexes the data channel, the first pilot channel and the second pilot channel. 
     
     
       5. The user apparatus as claimed in  claim 1 , wherein the mapping unit maps the control channel to one resource block or to several resource blocks. 
     
     
       6. A transmission method for use in a user apparatus in a mobile communication system in which a single carrier scheme is adopted in uplink and a system band is divided by a plurality of resource blocks, the transmission method comprising the steps of:
 mapping, to predetermined resource blocks, a data channel of the user apparatus, a first pilot channel that is not related to the data channel of the user apparatus, a second pilot channel that is related to the data channel of the user apparatus, and a control channel of the user apparatus; and 
 transmitting the data channel of the user apparatus, the first pilot channel, the second pilot channel and the control channel of the user apparatus that are mapped, 
 wherein the step of mapping includes mapping the first pilot channel to a plurality of resource blocks, mapping the second pilot channel to a resource block that is a same resource block as a resource block to which the data channel of the user apparatus is mapped, and 
 wherein the step of mapping includes mapping the control channel of the user apparatus to the resource block to which the data channel of the user apparatus is mapped when the control channel of the user apparatus and the data channel of the user apparatus are mapped to a same subframe, and mapping the control channel of the user apparatus to distributed resource blocks when the control channel of the user apparatus and the data channel of the user apparatus are not mapped to the same subframe. 
 
     
     
       7. The transmission method as claimed in  claim 6 , wherein the step of mapping includes mapping the control channel to the resource block to which the data channel is mapped in the subframe where the data channel is mapped, and mapping the control channel to a resource block other than resource blocks assigned to data channels of other user apparatuses in a subframe where the data channel is not mapped. 
     
     
       8. The transmission method as claimed in  claim 6 , wherein the first pilot channel mapped in the step of mapping is used for measurement, and the second pilot channel is used for demodulation of the data channel. 
     
     
       9. The transmission method as claimed in  claim 6 , wherein in the step of mapping, the data channel, the first pilot channel and the second pilot channel are time-division multiplexed. 
     
     
       10. The transmission method as claimed in  claim 6 , wherein the step of mapping includes mapping the control channel to one resource block or to several resource blocks. 
     
     
       11. A mobile communication system in which a single carrier scheme is adopted in uplink and a system band is divided by a plurality of resource blocks, the mobile communication system comprising:
 a user apparatus configured to transmit a data channel of the user apparatus, a first pilot channel that is not related to the data channel of the user apparatus, a second pilot channel that is related to the data channel of the user apparatus, and a control channel of the user apparatus; and 
 a base station configured to receive the data channel of the user apparatus, the first pilot channel, the second pilot channel and the control channel of the user apparatus from the user apparatus, 
 wherein the user apparatus maps the first pilot channel to a plurality of resource blocks, and maps the second pilot channel to a resource block that is a same resource block as a resource block to which the data channel of the user apparatus is mapped, and 
 wherein the user apparatus maps the control channel of the user apparatus to the resource block to which the data channel of the user apparatus is mapped when the control channel of the user apparatus and the data channel of the user apparatus are mapped to a same subframe, and the user apparatus maps the control channel of the user apparatus to distributed resource blocks when the control channel of the user apparatus and the data channel of the user apparatus are not mapped to the same subframe.